Gabbard's testimony highlights concerns over election integrity.
The US director of national intelligence linked the seizure to a US attorney's actions.
The testimony revives discussions around the 2020 election conspiracy theories.
Briefing: Gabbard Testimony on Puerto Rico Voting Machines Raises Questions About Venezuela Conspiracy Theory
Strategic angle: Tulsi Gabbard's testimony brings to light the controversial role of conspiracy theories in the context of voting machine seizures.